He has not filed any type of court proceedings over this weekend, especially without access to a solicitor, he’s full of crap. In any case what on Earth would he be requesting the court do? You don’t have a mortgage (or it seems any sort of shared finances) and he chooses not to see the children himself, and you said your children don’t like him anyway.
However do not in any circumstances send him any more text messages, especially regarding your need for sex, if things do get nasty, he would cling on to those messages as a way of smearing you in court.
I’m really struggling to understand this set-up, especially why he has manufactured this situation. I wonder if it’s all, or a mixture of the following:
-he’s a psychopath/sociopath/narcissist (and gets kicks from controlling you)
-financial reasons (maybe he earns much more than you think, so has manipulated you into thinking you have got it good)
-cultural reasons maybe? Are you in the UK, this all seems so backward?!
-he’s kept you thinking you’re in a relationship (when you’re not) to prevent any other good men/father figures being near your/‘his’ children.
-or he’s living a completely unacceptable hidden life, and this ‘family’ he has kept is just a front for something very unsavoury that he’d never want you to see (thinking illegal addiction/abuse type things).
-or finally he just checked out of your relationship years ago, and is totally spineless, and didn’t tell you, and perhaps he does in fact want a relationship with his children, just not with you, but he’s so spineless he’d rather not see his children just so he doesn’t have to tell you the truth.
Only you can work out what’s gone on here. You definitely need professional help to navigate this situation.